Twelve new records of pteridophytes from Bolaven Plateau, southern Laos

Abstract

Twelve Pteridophytes of six families are reported from Bolaven Plateau, southern Laos, as new records to the flora of Laos. For each species, voucher specimens, photographs, and additional information including geographical distribution, ecology and taxonomic notes are provided.

Croton nagaoi, a new species of Euphorbiaceae from southern Laos

“…Thanks to their support, we could have intensive field surveys on the Bolaven Plateau, which resulted in a better understanding of the flora of Bolaven and the discovery of more than 18 new species including the new species of Croton described in this study and 65 new country records (e.g. Souladeth et al 2020, Vongthavone et al 2021.…”

Lepisorus medioximus (Polypodiales, Polypodiaceae), a new species from Shan State of Myanmar

“…Two unusual specimens of Lepisorus were collected in Pin Laung Township, Ka Thaung (upper) located in the southern part of the state, which were recognized as a putative new species. This proposal was studied by consulting checklists of Myanmar and adjacent areas ( Dickason 1946 ; Lindsay and Middleton 2012; Qi et al 2013 ; Khine et al 2017 ; Khine and Schneider 2020 ; Hori 2021 ; Vongthavone et al 2021 ), and careful comparison of morphological characters with previously described species by consulting specimens and species protologues (e.g., Ching 1933 ; Bir and Trikha 1969 ; Yu and Lin 1996 , 1997 ; Lin 2000 ; Qi et al 2013 ). Besides morphological diagnostics, we employed DNA sequences to identify genotypic evidence supporting these two specimens as distinct species from any other species that are previously described.…”